<!DOCTYPE html>
<HTML>
<HEAD>
  <TITLE> ZTREE DEMO - beforeExpand / onExpand && beforeCollapse / onCollapse</TITLE>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <link rel="stylesheet" href="../../../css/demo.css" type="text/css">
  <link rel="stylesheet" href="../../../css/zTreeStyle/zTreeStyle.css" type="text/css">
  <script type="text/javascript" src="../../../js/jquery-1.4.4.min.js"></script>
  <script type="text/javascript" src="../../../js/jquery.ztree.core-3.5.js"></script>
  <!-- <script type="text/javascript" src="../../../js/jquery.ztree.excheck-3.5.js"></script>
  <script type="text/javascript" src="../../../js/jquery.ztree.exedit-3.5.js"></script>-->
  <SCRIPT type="text/javascript">
    <!--
    var setting = {
      view: {
        selectedMulti: false
      },
      data: {
        key: {
          title: "t"
        },
        simpleData: {
          enable: true
        }
      },
      callback: {
        beforeClick: beforeClick,
        beforeCollapse: beforeCollapse,
        beforeExpand: beforeExpand,
        onCollapse: onCollapse,
        onExpand: onExpand
      }
    };

    var zNodes = [
      { id: 1, pId: 0, name: "ordinary parent 1", t: "I am ordinary, just expand or collapse on me", open: true },
      { id: 11, pId: 1, name: "leaf node 1-1", t: "..." },
      { id: 12, pId: 1, name: "ordinary parent 2", t: "I am ordinary, just expand or collapse on me" },
      { id: 121, pId: 12, name: "leaf node 2-1", t: "..." },
      { id: 122, pId: 12, name: "leaf node 2-2", t: "..." },
      { id: 123, pId: 12, name: "leaf node 2-3", t: "..." },
      { id: 13, pId: 1, name: "leaf node  1-3", t: "..." },
      { id: 2, pId: 0, name: "can't collapse me", t: "can't collapse me...Unless you use expandAll method.", open: true, collapse: false },
      { id: 21, pId: 2, name: "leaf node 2-1", t: "You can't collapse my parent" },
      { id: 22, pId: 2, name: "leaf node 2-2", t: "You can't collapse my parent" },
      { id: 23, pId: 2, name: "leaf node 2-3", t: "You can't collapse my parent" },
      { id: 3, pId: 0, name: "can't expand me", t: "can't expand me...Unless you use expandAll method.", open: false, expand: false },
      { id: 31, pId: 3, name: "leaf node 3-1", t: "OMG, you can see me!! Do you use the expandAll method?" },
      { id: 32, pId: 3, name: "leaf node 3-2", t: "OMG, you can see me!! Do you use the expandAll method?" },
      { id: 33, pId: 3, name: "leaf node 3-3", t: "OMG, you can see me!! Do you use the expandAll method?" },
      { id: 4, pId: 0, name: "empty parent 1", t: "I have nothing...", isParent: true, open: false }
    ];

    var log, className = "dark";

    function beforeClick(treeId, treeNode) {
      if (treeNode.isParent) {
        return true;
      } else {
        alert("This Demo is used to test the parent node expand / collapse...\n\nGo to click parent node... ");
        return false;
      }
    }

    function beforeCollapse(treeId, treeNode) {
      className = (className === "dark" ? "" : "dark");
      showLog("[ " + getTime() + " beforeCollapse ]&nbsp;&nbsp;&nbsp;&nbsp;" + treeNode.name);
      return (treeNode.collapse !== false);
    }

    function onCollapse(event, treeId, treeNode) {
      showLog("[ " + getTime() + " onCollapse ]&nbsp;&nbsp;&nbsp;&nbsp;" + treeNode.name);
    }

    function beforeExpand(treeId, treeNode) {
      className = (className === "dark" ? "" : "dark");
      showLog("[ " + getTime() + " beforeExpand ]&nbsp;&nbsp;&nbsp;&nbsp;" + treeNode.name);
      return (treeNode.expand !== false);
    }

    function onExpand(event, treeId, treeNode) {
      showLog("[ " + getTime() + " onExpand ]&nbsp;&nbsp;&nbsp;&nbsp;" + treeNode.name);
    }

    function showLog(str) {
      if (!log) log = $("#log");
      log.append("<li class='" + className + "'>" + str + "</li>");
      if (log.children("li").length > 8) {
        log.get(0).removeChild(log.children("li")[0]);
      }
    }

    function getTime() {
      var now = new Date(),
        h = now.getHours(),
        m = now.getMinutes(),
        s = now.getSeconds(),
        ms = now.getMilliseconds();
      return (h + ":" + m + ":" + s + " " + ms);
    }

    function expandNode(e) {
      var zTree = $.fn.zTree.getZTreeObj("treeDemo"),
        type = e.data.type,
        nodes = zTree.getSelectedNodes();
      if (type.indexOf("All") < 0 && nodes.length == 0) {
        alert("Please select one parent node at first...");
      }

      if (type == "expandAll") {
        zTree.expandAll(true);
      } else if (type == "collapseAll") {
        zTree.expandAll(false);
      } else {
        var callbackFlag = $("#callbackTrigger").attr("checked");
        for (var i = 0, l = nodes.length; i < l; i++) {
          zTree.setting.view.fontCss = {};
          if (type == "expand") {
            zTree.expandNode(nodes[i], true, null, null, callbackFlag);
          } else if (type == "collapse") {
            zTree.expandNode(nodes[i], false, null, null, callbackFlag);
          } else if (type == "toggle") {
            zTree.expandNode(nodes[i], null, null, null, callbackFlag);
          } else if (type == "expandSon") {
            zTree.expandNode(nodes[i], true, true, null, callbackFlag);
          } else if (type == "collapseSon") {
            zTree.expandNode(nodes[i], false, true, null, callbackFlag);
          }
        }
      }
    }

    $(document).ready(function() {
      $.fn.zTree.init($("#treeDemo"), setting, zNodes);
      $("#expandBtn").bind("click", { type: "expand" }, expandNode);
      $("#collapseBtn").bind("click", { type: "collapse" }, expandNode);
      $("#toggleBtn").bind("click", { type: "toggle" }, expandNode);
      $("#expandSonBtn").bind("click", { type: "expandSon" }, expandNode);
      $("#collapseSonBtn").bind("click", { type: "collapseSon" }, expandNode);
      $("#expandAllBtn").bind("click", { type: "expandAll" }, expandNode);
      $("#collapseAllBtn").bind("click", { type: "collapseAll" }, expandNode);
    });
    //-->
  </SCRIPT>
</HEAD>

<BODY>
<h1>Control of Expand Node</h1>
<h6>[ File Path: core/expand.html ]</h6>
<div class="content_wrap">
  <div class="zTreeDemoBackground left">
    <ul id="treeDemo" class="ztree"></ul>
  </div>
  <div class="right">
    <ul class="info">
      <li class="title">
        <h2>1, 'beforeCollapse / onCollapse'<br/>&nbsp;&nbsp;'beforeExpand / onExpand' callback function
        </h2>
        <ul class="list">
          <li>
            Use 'beforeCollapse / onCollapse' and 'beforeExpand / onExpand' callback function can control whether to allow expand or collapse the parent node
            . This simple demo shows how to monitor the collapse and expand event.
          </li>
          <li>
          <p>
            Try: <br/>
            &nbsp;&nbsp;&nbsp;&nbsp;<input type="checkbox" id="callbackTrigger" checked/> Whether trigger the callback when execution expandNode() method.<br/>
            &nbsp;&nbsp;&nbsp;&nbsp;Single Node --[ <a id="expandBtn" href="#" title="expand..." onclick="return false;">expand</a> ]
            &nbsp;&nbsp;&nbsp;&nbsp;[ <a id="collapseBtn" href="#" title="collapse..." onclick="return false;">collapse</a> ]
            &nbsp;&nbsp;&nbsp;&nbsp;[ <a id="toggleBtn" href="#" title="what do you want?..." onclick="return false;">toggle</a> ]<br/>
            &nbsp;&nbsp;&nbsp;&nbsp;Single Node (including child) --[ <a id="expandSonBtn" href="#" title="expand (including child)..." onclick="return false;">expand</a> ]
            &nbsp;&nbsp;&nbsp;&nbsp;[ <a id="collapseSonBtn" href="#" title="collapse (including child)..." onclick="return false;">collapse</a> ]<br/>
            &nbsp;&nbsp;&nbsp;&nbsp;All Nodes --[ <a id="expandAllBtn" href="#" title="expand All!!" onclick="return false;">expand All</a> ]
            &nbsp;&nbsp;&nbsp;&nbsp;[ <a id="collapseAllBtn" href="#" title="collapse All!!" onclick="return false;">collapse All</a> ]
          </p>
          <li>
            <p>
              <span class="highlight_red">How to use zTreeObj.updateNode method,  please see the API documentation.</span><br/>
              collapse / expand log:<br/>
              <ul id="log" class="log"></ul>
            </p>
          </li>
        </ul>
      </li>
      <li class="title">
        <h2>2, Explanation of setting</h2>
        <ul class="list">
          <li class="highlight_red">Set attributes about 'setting.callback.beforeCollapse / onCollapse / beforeExpand / onExpand', please see the API documentation for more related contents.</li>
          <li class="highlight_red">If you need to adjust the expand / collapse animation effects, please see the API documentation about setting.view.expandSpeed.</li>
        </ul>
      </li>
      <li class="title">
        <h2>3, Explanation of treeNode</h2>
        <ul class="list">
          <li>No special requirements on the node data, the user can add custom attributes.</li>
        </ul>
      </li>
    </ul>
  </div>
</div>
</BODY>
</HTML>